// This THREEx helper makes it easy to handle window resize.
// It will update renderer and camera when window is resized.
//
// # Usage
//
// **Step 1**: Start updating renderer and camera
//
// ```var windowResize = THREEx.WindowResize(aRenderer, aCamera)```
//
// **Step 2**: Start updating renderer and camera
//
// ```windowResize.stop()```
// # Code

//

/** @namespace */
var THREEx = THREEx || {};

/**
 * Update renderer and camera when the window is resized
 *
 * @param {Object} renderer the renderer to update
 * @param {Object} Camera the camera to update
 */
THREEx.WindowResize = function(renderer, camera) {
	var callback = function() {
			// notify the renderer of the size change
			renderer.setSize(window.innerWidth, window.innerHeight);
			// update the camera
			camera.aspect = window.innerWidth / window.innerHeight;
			camera.updateProjectionMatrix();
			render();
		}
		// bind the resize event
	window.addEventListener('resize', callback, false);
	// return .stop() the function to stop watching window resize
	return {
		/**
		 * Stop watching window resize
		 */
		stop: function() {
			window.removeEventListener('resize', callback);
		}
	};
}
